Stovepipe.



N0. 7l4,629. Patented Nov. 25, I902.

-J. WYLIE.

STOVEPIPE.

(Application filed June 20, 1902.)

(No Model.)

I ENTOR ATTORNEYS.

we: norms PETERS co, Pnonzumu, wnsumorcw. n. :4

of the United States, residing in Chattanooga,

clenched.

l the joint closer and stronger.

ments in Stovepipes, of which the following together and permanentlylocked, thus obvitially fiat against the inward-extending fold- UNITEDSTATES ATENT OFFICE.

JAMES WVYLIE, OF OHATTANOOGA, TENNESSEE.

STOVEPIPE.

SPECIFICATION forming part of Letters Patent No. 714,629, dated November25, 1902.

Application filed June 20, 1902.

To all whom it may concern:

Be it known that I, JAMES WYL IE, a citizen county of Hamilton, State ofTennessee, have invented certain new and useful Improveis aspecification, reference being had therein to the accompanying drawings,in which Figure 1 is a transverse sectional view of a part of astovepipe, showing the interlocking joint; Fig. 2, a similar viewshowingthe parts separated and in perspective. Fig. 3 is a plan view of a blankfrom which a Stovepipe-section is formed. Fig. at is an elevation of astovepipe-section before the edges thereof are interlocked. Fig. 5 is adetail cross-sectional view of the joint, showing the locking flange Oneobject of this invention is to provide a Stovepipe-section with aninterlocking joint parts of which joint maybe readily connected atingthe necessity of clenching the joint by hammering together the foldsthereof or by riveting them to prevent the accidental separationthereof.

Another object of the invention is to provide a joint which will permita piece of any desired. length to be cut from either end of the pipewithout in the least destroying the joint, the effectof such cuttingbeing rather to make Referring to the various parts by numerals, 1designates the sheet of metal from which the pipe-section is formed.This sheet of metal isbent transversely to substantially cylindric form,and each edge of this curved sheet is folded inward upon, itself and iscaused to lie substantially flat against the interior surface of themain portion of the sheet, the rounded edges 2 and 3 being there-' byformed. These folded-under portions of the sheet are then bent uponthemselves to form the edges l and 5 and the outward-extended parts 6and 7, which parts lie substaned parts 8 and 9, a slight channel 10being formedbetween the parts 7 and 9, for a purpose which willhereinafter appear. The out- Ward-extending parts 6 and 7 project asuitable distance beyond the edges 2 and 8, the

Serial No. 112,538. (No model.)

part 7 being broader than the part 6. The outer edge of the part 7 isbent outward and is inclined toward the edge 2 to form a substantiallyradial looking-flange 11.

The projecting part 6 forms alocking-tongue which is adapted to. fit inthe channel 10 formed between the parts 7 and 9, and the locking-flange11 is adapt-ed to engage the edge 4 and to thereby lock the tongue 6within the channel 10. When the parts are in this position, the twoedges 2 and 3 are very close together,thereby forming a very neatjoint.The part 7 forms a spring member which will snap into place after thelocking-tongue has been forced into the channel 10, the said springmember in the operation of connecting the two members being forcedinward sufficiently to permit the insertion of the tongue 6 in saidchannel. When the tongue 6 has been forced into the channel asdescribed, the locking flange 11 passes off the part 6 and snaps back ofthe edge 4, thereby locking the tongue in the channel. It will bereadily seen that the locking-flange 11 prevents the withdrawal of thetongue from the channel and that the edges 2 and 3 abutting togetherwould prevent the collapsing of the pipe by any straintendingtocompressit. Theedgeofthetongue 6 by contacting with the innersurface of the fold 5 also prevents the collapsing of the pipe exceptunder a severe strain or pressure tending to compress it. Such strain,however, in order to collapse the pipe would have to be great enough tobend the metal of the body of the pipe, as the joint would resist agreater compressing strain than the body of the pipe.

Instead of forming the locking-flange throughout the entire length ofpipe-section, which construction is preferred, the sheet from which thepipe-section is to be made may be cut out along one longitudinal edge,as shown at 15 in Fig. 3, so that when the edge is turned up to form thelocking-flange 10 said flanges will extend only part way along the edgeof the pipe-section, as shown in Fig. 4. As stated, however, it ispreferred that the edge be continuous, so that the pipe may be made, asusual, from a substantially rectangular sheet, my main object inreserving the right to cut out a portion of the edge being that it mightthus be made easier on a flanging-machine.

i It is customary to ship stovepipes from the factory to the retailmerchant in a knockdown conditionthat is, the longitudinal joint of eachsection is separated, and the sections in this condition are placed onewithin the other or nested, the object of this being to pack thesections in the smallest space possible. The retail merchant must beforesellingthe pipe connect thelongitudinal edges of the sectionspermanently together. With the stovepipes of the ordinary constructionit is necessary to hammer or otherwise compress the overlapping jointand to rivet the parts together. This assembling of the stovepipes bythe retailer is very annoying, requires considerable time, andnecessitates the maintaining by the retailer of a more or less extensivetin-shop. With stovepipes constructed according to this invention theassembling of the pipes in completed form will be a very simple matter,requiring no hammering or otherwise compressingof the joints, and whenthe joints are assembled the pipe cannot be collapsed by pressuretending to separate its edges. It is obvious that riveting is avoidedand that compressing the joint is unnecessary..

. It will be noted that should the pipe be cut at any point the folds ofthe metal in the joint will be forced closer together and that by reasonof the inclination of the flange 11 toward the edge 2 said flange willbe forced against the edge 4, should said flange be out, and'moresecurely lock the parts of the joint together. It will be seen alsothat'the flange 11 is bent over slightly more than a right angle, sothat when it snaps into place over the rounded edge 4 the edges 2 and 3will be prevented from drawing apart. When the parts are thusinterlocked, it is preferred that the flange 11 be bent or clenched downover edge 4 at one or both ends, but preferably at the larger end onlyof the pipe-section, as shown in Fig. 6, this clenching or setting ofthe flange being best accomplished by the simple stroke of a mallet.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

A look-joint for pipes comprised of two members one of which is formedon each edge of the sheet forming the pipe, one of said members beingcomprised of the inward-folded part 9, the outward-folded spring part 7and the locking-flange 11 formed on the outer edge of the part 7, achannel being formed between the parts 7 and 9; the other member beingformed on the other edge of the sheet and being comprised of theinward-folded part8, and the outward-folded part 6 forming alocking-tongue,said tongue'being adapted to enter the channel formedbetween the parts 7 and 9, and the locking-flange being adapted to besprung inward to permit the part 6 to be passed into the channel betweenthe parts 7 and 9, and to then spring outward to engage back of the foldat theinner edge of the said part 6, to lock the parts in engagement.

. In testimony whereof I hereunto affix my signature, in the presence oftwo witnesses, this 17th day of June, 1902.

O. W. STOOKARD, E. I. PooL.

